article {
    width: 800px;
    margin: 150px auto;
}

#timeline {
    list-style: none;
}

#timeline li {
    border-left: 2px solid skyblue;
    position: relative;
    padding: 15px;
}

#timeline li:first-child::after {
    transform: scale(1.5);
    border-color: hotpink;
}

#timeline li::after {
    box-sizing: border-box;
    content: "";
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 3px solid blueviolet;
    background-color: #fff;
    left: -8px;
    top: 0;
}

#timeline li:hover::after {
    border-color: red;
}

time {
    font-size: 14px;
}

.title {
    padding-top: 10px;
    transition: all .5s;
}

li>a {
    display: block;
}

li:hover .title {
    color: turquoise;
    transform: translateX(20px);
}

h2 {
    font-size: 32px;
}

h3 {
    font-size: 24px;
}

#timeline li img {
    float: left;
    width: 80px;
    margin-right: 15px;
}